JSON Formatter
Validate, pretty-print or minify JSON with error line:col reporting
About This Tool
Developer utilities: JSON formatting, regex testing, Base64, timestamps, UUID and JWT parsing — all processed locally, code snippets never leave your browser.
Frequently Asked Questions
Does it locate errors?
Yes, validation failures report the exact line and column.
What operations are supported?
Validate, pretty-print with indentation, or minify to one line.
Is my data uploaded?
No, formatting happens locally.